C#泛型作为返回类型的写法

 public static T GetObj<T>(Employee model)
        {
            T result = default(T);
            if (model is T)
            {
                result = (T)(object)model; //或 (T)((object)model);
            }
            return result;
        }

控件在设计模式时，禁止访问数据库和API

 private async void SetMoldStandardResourceControl_Load(object sender, EventArgs e)
        {
            if (this.DesignMode == false)
            {//控件在非设计模式下才访问数据库
                await SetDataSource();
                m_ProjectCategories = await m_ProjectCategoryService.GetAllAsync();
            }
        }